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Asset Sale and Loan Restructuring - Summary of Combined Carrying Value of All Loans (Parenthetical) (Detail) - USD ($) | Dec. 10, 2015 | Dec. 31, 2017 | Dec. 31, 2016
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Troubled Debt Restructuring, Debtor, Current Period [Line Items] |  |  |
Loans payable |  | $ 27,363,442 | $ 25,067,308
Monaco Loan [Member] |  |  |
Troubled Debt Restructuring, Debtor, Current Period [Line Items] |  |  |
Loans payable | $ 5,000,000 |  |
Additional consideration percentage | 21.25% |  |
Amount of debt being extinguished | $ 5,000,000 |  |

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